跨域共享Cookie示例

package.json

{
  "name": "cookie example",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "connect-redis": "^3.3.3",
    "cookie-parser": "^1.4.3",
    "express": "^4.16.2",
    "express-session": "^1.15.6"
  }
}

server.js

const express = require("express");
const cookieParser = require("cookie-parser");
const session = require("express-session");
const RedisStore = require("connect-redis")(session);

const cookieOptions = {
  // 如果主站为 xxxx.com，则此值设置为 .xxxx.com （正式和测试环境均一样）
  // 比如 xxx.com, www.xxx.com, test.xxx.com, abc.test.xxx.com 均能获取到这些 cookie
  domain: ".localexample.com",
  httpOnly: true,
  path: "/",
  maxAge: 3600000 * 24 * 365
};

const app = express();
app.use(cookieParser());
app.use(
  session({
    store: new RedisStore({}),
    secret: "secret key",
    resave: false,
    cookie: cookieOptions
  })
);
app.get("/", function(req, res) {
  const v = process.uptime();
  const oldv = req.session.v;
  console.log(req.headers.host, v);
  req.session.v = v;
  res.cookie("hello", v, cookieOptions);
  res.json({ current: v, session: oldv, cookies: req.cookies });
});

app.listen(80, () => {
  console.log("server is running...");
  console.log(cookieOptions);
});